# Can not calibrate, No Mags detected

Source: https://forum.modalai.com/topic/453/can-not-calibrate-no-mags-detected
Category: Flight Core and Legacy VOXL (https://forum.modalai.com/category/9/flight-core-and-legacy-voxl)
Tags: voxl-flight
Posted: 2021-09-20 23:45:25 UTC by wilkinsaf
Replies: 4 · Views: 1037

## wilkinsaf · 2021-09-20 23:45:25 UTC

![1498c52f-3496-4a49-97ca-cc71ffae12af-image.png](https://forum.modalai.com/assets/uploads/files/1632181450046-1498c52f-3496-4a49-97ca-cc71ffae12af-image.png) 

I found the most recent ModalAI firmware on PX4-Autopilot Github. I selected "Generic Quad" Airframe. I power cycle. I try to calibrate Compass and am greeted with this issue. 

Also, I did not calibrate Gyroscope. No clue why that is green

## Reply by Chad Sweet (ModalAI staff) · 2021-09-20 23:48:31 UTC

Hi, please see this page for tested versions of firmware. https://docs.modalai.com/flight-core-firmware/

The latest is a fast moving target, we try to get a stable version of each major release though.

## Reply by wilkinsaf · 2021-09-21 01:07:37 UTC

Perfect, thank you Chad

## Reply by modaltb (ModalAI staff) · 2021-09-21 17:47:08 UTC

@wilkinsaf , just a note, that there is no magnetometer on the Flight Core or the VOXL-Flight, instead we require the use of an external mag (similar to our m500 which uses the Holybro GPS/mag assembly)

## Reply by wilkinsaf · 2021-09-22 17:53:37 UTC

Yes, I realized I forgot to load the correct .params file before starting calibration. After selecting the one that disables gps and mag I had success.

Thank you